J/AJ/151/6ivo://CDS.VizieR/J/AJ/151/6doi:10.26093/cds/vizier.51510006CDSSales Silva J.V.Carraro G.Anthony-Twarog B.J.Moni Bidin C.Costa E.,Twarog B.A.2018-10-01T13:50:04Z2018-03-20T15:24:06ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frmilky-way-galaxyopen-star-clustersvisible-astronomymedium-band-photometryinfrared-photometrybroad-band-photometryradial-velocityspectroscopyline-intensitieseffective-temperaturemetallicityOpen clusters can be the key to deepening our knowledge on various issues involving the structure and evolution of the Galactic disk and details of stellar evolution because a cluster's properties are applicable to all its members. However, the number of open clusters with detailed analysis from high-resolution spectroscopy or precision photometry imposes severe limitations on studies of these objects. To expand the number of open clusters with well-defined chemical abundances and fundamental parameters, we investigate the poorly studied, anticenter open cluster Tombaugh 1. Using precision uvbyCaH{beta} photometry and high-resolution spectroscopy, we derive the cluster's reddening, obtain photometric metallicity estimates, and, for the first time, present a detailed abundance analysis of 10 potential cluster stars (nine clump stars and one Cepheid). Using the radial position from the cluster center and multiple color indices, we have isolated a sample of unevolved, probable single-star members of Tombaugh 1. From 51 stars, the cluster reddening is found to be E(b-y)=0.221+/-0.006 or E(B-V)=0.303+/-0.008, where the errors refer to the internal standard errors of the mean. The weighted photometric metallicity from m_1_ and hk is [Fe/H]=-0.10+/-0.02, while a match to the Victoria-Regina Stromgren isochrones leads to an age of 0.95+/-0.10 Gyr and an apparent modulus of (m-M)=13.10+/-0.10. Radial velocities identify six giants as probable cluster members, and the elemental abundances of Fe, Na, Mg, Al, Si, Ca, Ti, Cr, Ni, Y, Ba, Ce, and Nd have been derived for both the cluster and the field stars. Tombaugh 1 appears to be a typical inner thin disk, intermediate-age open cluster of slightly subsolar metallicity, located just beyond the solar circle, with solar elemental abundance ratios except for the heavy s-process elements, which are a factor of two above solar. Its metallicity is consistent with a steep metallicity gradient in the galactocentric region between 9.5 and 12 kpc. Our study also shows that Cepheid XZ CMa is not a member of Tombaugh 1 and reveals that this Cepheid presents signs of barium enrichment, making it a probable binary star.2016AJ....151....6Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/151/6CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/340/304 : [X/Fe] of Galactic disc F and G dwarfs (Reddy+, 2003)J/A+A/421/991 : CT1 photometry in Tombaugh 1 (Piatti+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/151/6https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/151/6http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/151/6https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/151/6https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/151/6http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/151/6GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/151/6/table3 (Excerpt of the Photometric Catalog of Tombaugh 1)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/151/6/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/151/6/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/151/6/table3?GETtext/xml+votable180.050000true105.1726-20.67540.005555555555555556Cone search capability for table J/AJ/151/6/table4 (Potential Cluster Stars Observed with IMACS in the Field of Tombaugh 1)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/151/6/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/151/6/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/151/6/table4?GETtext/xml+votable180.050000true105.02375-20.5890280.0055555555555555566/20833 208363.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/151/6?format=asciiInfraredOpticaldefaultJ/AJ/151/6/table3Excerpt of the Photometric Catalog of Tombaugh 1SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainVmag[7.179/11.051] V-band magnitudemagphot.mag;em.opt.Vfloate_Vmag[0.0016/0.0195] Uncertainty in Vmagmagstat.error;phot.mag;em.opt.Vfloatb-y[0.044/1.387] Stromgren b-y color indexmagphot.color;em.opt.B;em.opt.Vfloate_b-y[0.0023/0.0204] Uncertainty in b-ymagstat.error;phot.color;em.opt.Bfloathk[0.234/1.976] Stromgren hk indexmagphot.colorfloate_hk[0.0032/0.0213] Uncertainty in hkmagstat.errorfloatHbmag[2.532/2.915] Stromgren H{beta}-band magnitudemagphot.color;em.opt.B;em.line.Hbetafloate_Hbmag[0.0019/0.0074] Uncertainty in Hbmagmagstat.error;phot.mag;em.IR.Hfloatm1[0.050/0.661] Stromgren m_1_ indexmagphot.colorfloate_m1[0.0030/0.0205] Uncertainty in m1magstat.errorfloatc1[-0.319/1.012] Stromgren c_1_ indexmagphot.colorfloatJ/AJ/151/6/table57Observed Fe I and Fe II Lines (table 5) and Other Lines Studied (table 7)RefReference (only in table 7) (G1)meta.ref;pos.framecharElElementphys.atmol.elementcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambda[4534.78/8736.04] Wavelength {lambda} ({AA})0.1nmem.wlfloatExPot[0/6.18] Excitation potentialeVphys.atmol.excitationfloatlog(gf)[-5.95/0.514] Log oscillator strengthphys.atmol.oscStrengthfloatEW-769[25/158]? Equivalent width for star 769 (m{AA})0.1pmspect.line.eqWidthintnullableEW-806[10/152]? Equivalent width for star 806 (m{AA})0.1pmspect.line.eqWidthintnullableEW-1110[23/140]? Equivalent width for star 1110 (m{AA})0.1pmspect.line.eqWidthintnullableEW-1118[26/155]? Equivalent width for star 1118 (m{AA})0.1pmspect.line.eqWidthintnullableEW-395[24/159]? Equivalent width for star 395 (m{AA})0.1pmspect.line.eqWidthintnullableJ/AJ/151/6/table9Atmospheric Parameters from Photometry (ph) and Spectroscopy (sp)ComCommentmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[395/1616] Star identifiermeta.id;meta.mainintTeffph[4796/6324] Photometric effective temperatureKphys.temperature.effectiveintloggph[2.53/2.86] Photometric surface gravity (dex)log(cm.s**-2)phys.gravityfloatTeffsp[4900/6000] Spectroscopic effective temperatureKphys.temperature.effectiveintloggsp[2.0/3.5] Spectroscopic surface gravity (dex)log(cm.s**-2)phys.gravityfloatksi[1.0/4.9] Microturbulent velocity {ksi}km/sphys.velocfloat[FeI/H][-0.53/0.10] Abundance ratio [FeI/H]phys.abund;arith.ratiofloate_[FeI/H][0.12/0.19] Uncertainty in [FeI/H]stat.error;phys.abundfloato_[FeI/H][15/53] Number of FeI lines employedmeta.numberint[FeII/H][-0.52/0.08] Abundance ratio [FeII/H]phys.abund;arith.ratiofloate_[FeII/H][0.09/0.17]? Uncertainty in [FeII/H]stat.error;phys.abundfloatnullableo_[FeII/H][2/6] Number of FeII lines employedmeta.numberintJ/AJ/151/6/table68Observed Fe I and Fe II Lines (table 6) and Other Lines Studied (table 8)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintElElementphys.atmol.elementcharlambda[4730.04/8773.91] Wavelength {lambda} ({AA})0.1nmem.wlfloatExPot[0/6.18] Excitation potentialeVphys.atmol.excitationfloatlog(gf)[-5.79/0.514] Log oscillator strengthphys.atmol.oscStrengthfloatRefReference (only in table 8) (G1)meta.ref;pos.framecharEW-1534[21/158]? Equivalent width for star 1534 (m{AA})0.1pmspect.line.eqWidthintnullableEW-1616[18/151]? Equivalent width for star 1616 (m{AA})0.1pmspect.line.eqWidthintnullableEW-1349[24/156]? Equivalent width for star 1349 (m{AA})0.1pmspect.line.eqWidthintnullableEW-784[21/160]? Equivalent width for star 784 (m{AA})0.1pmspect.line.eqWidthintnullableEW-663[24/155]? Equivalent width for star 663 (m{AA})0.1pmspect.line.eqWidthintnullableJ/AJ/151/6/table4Potential Cluster Stars Observed with IMACS in the Field of Tombaugh 1recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[395/1616] Star identifiermeta.id;meta.mainintn_ID[a] Note on ID (1)meta.notecharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainVmag[13.01/14.20] V-band magnitudemagphot.mag;em.opt.Vfloatb-y[0.51/0.83] Stromgren b-y color indexmagphot.color;em.opt.B;em.opt.VfloatV-I[1.11/1.32] V-I color index from Carraro & Patat (1995MNRAS.276..563C)magphot.color;em.opt.V;em.opt.IfloatHRV1[42.7/100.0] Heliocentric radial velocity at epoch 1km/sspect.dopplerVeloc;pos.heliocentricfloate_HRV1[1.4/3.8] Uncertainty in HRV1km/sstat.errorfloatHRV2[44.8/99.0] Heliocentric radial velocity at epoch 2km/sspect.dopplerVeloc;pos.heliocentricfloate_HRV2[1.3/4.6] Uncertainty in HRV2km/sstat.errorfloat<HRV>[43.7/99.5] Heliocentric radial velocity mean valuekm/sspect.dopplerVeloc;stat.meanfloate_<HRV>[0.0/1.3] Uncertainty in <HRV>km/sstat.errorfloatl_vsini[<] Limit flag on vsinimeta.code.error;phys.veloc.rotatcharvsini[2.7/6.1]? Projected rotational velocity ({nu} sin i)km/sphys.veloc.rotatfloatnullablee_vsini[0.4/0.9]? Uncertainty in vsinikm/sstat.error;phys.veloc.rotatfloatnullableS/N[44/110] Spectral signal-to-noise ratio at 6000{AA}stat.snrintTabNumber of the table containing equivalent widths for this starmeta.numberintAtmoAtmospheric parameters from Table 9meta.ref.urlcharEWEquivalent widths from Table 57 or 68meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar